Hi @gomezreduardo,
Microsoft says they are in the process of trying to fix an issue with uploading files with non-ASCII characters in them. Currently you can get into this cycle where the upload is rejected (incorrectly giving a session error) and odrive retries, creating these tmp files.
The tmp files, themselves, are invisible to us. This post goes into more detail about that:
Currently, the only way to clear those up is to wait for Microsoft to do it, or to do it manually from the OneDrive web client.